Preparation of Fe-BEA zeolites by isomorphous substitution for oxidehydration of glycerol to acrylic acid

The preparation by post-synthesis isomorphous substitution of FeX-BEA-Y in one step was investigated for the oxidehydration of pure glycerol. TPR and DR UV–vis highlighted the presence of Fe(+III) species in the framework of zeolites. Iron allows the activation of the catalyst by the reduction by gl...

Full description

Saved in:
Bibliographic Details
Published in:Catalysis communications 2016-04, Vol.79, p.58-62
Main Authors: Diallo, Modibo Mounguengui, Mijoin, Jérôme, Laforge, Sébastien, Pouilloux, Yannick
Format: Article
Language:English
Subjects:
Acrylic acid
Catalysis
Chemical Sciences
Oxidehydration
Renewable resources
Zeolite
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The preparation by post-synthesis isomorphous substitution of FeX-BEA-Y in one step was investigated for the oxidehydration of pure glycerol. TPR and DR UV–vis highlighted the presence of Fe(+III) species in the framework of zeolites. Iron allows the activation of the catalyst by the reduction by glycerol of part of Fe(+III) into Fe(+II) species, which stabilizes the glycerol conversion. Total glycerol conversion is obtained with 4wt% of iron and acrylic acid yield reaches 23% over this catalyst. The Fe(+III) tetrahedral species are thought to be the main active redox sites for the formation of acrylic acid. [Display omitted] •Iron over BEA zeolites increases the glycerol conversion.•Total conversion of pure glycerol is achieved over 4% Fe BEA zeolite with Si/Al=50.•Fe(+II) species are proposed as main active sites for glycerol conversion.•Fe(+III) species are thought to be active sites for acrylic acid formation.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2016.03.003